cronekorkn/bootshorn_investigation
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CroneKorkN 2025-06-01 19:31:52 +02:00
parent c165442acc
commit 3b483805df
Signed by: cronekorkn
SSH key fingerprint: SHA256:v0410ZKfuO1QHdgKBsdQNF64xmTxOF8osF1LIqwTcVw
1 changed files with 10 additions and 6 deletions
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16
process
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@ -26,6 +26,7 @@ MIN_SIGNAL_QUALITY = 1000.0 # maximum noise level (relative DB) to consider a de
PLOT_PADDING_START_SECONDS = 2 # seconds (padding before and after the event in the plot)
PLOT_PADDING_END_SECONDS = 3 # seconds (padding before and after the event in the plot)
def process_recording(filename):
print('processing', filename)
@ -108,13 +109,19 @@ def process_recording(filename):
sample_num += samples_per_block - overlapping_samples
def write_event(current_event, sound, samplerate):
# write a spectrogram using the sound from start to end of the event
def write_event(current_event, sound, samplerate):
event_start_sample = current_event['start_sample'] - samplerate * PLOT_PADDING_START_SECONDS
event_end_sample = current_event['end_sample'] + samplerate * PLOT_PADDING_END_SECONDS
event_clip = sound[event_start_sample:event_end_sample]
event = current_event['start_at'] - datetime.timedelta(seconds=PLOT_PADDING_START_SECONDS)
filename_prefix = current_event['start_at'].strftime('%Y-%m-%d_%H-%M-%S.%f%z')
# write flac
flac_path = os.path.join(DETECTIONS_DIR, f"{filename_prefix}.flac")
soundfile.write(flac_path, event_clip, samplerate, format='FLAC')
# write spectrogram
plt.figure(figsize=(8, 6))
plt.specgram(event_clip, Fs=samplerate, NFFT=samplerate, noverlap=samplerate//2, cmap='inferno', vmin=-100, vmax=-10)
plt.title(f"Bootshorn @{event.strftime('%Y-%m-%d %H:%M:%S')}")
@ -122,12 +129,9 @@ def write_event(current_event, sound, samplerate):
plt.ylabel("Frequency (Hz)")
plt.colorbar(label="Intensity (dB)")
plt.ylim(50, 1000)
spectrogram_path = os.path.join(DETECTIONS_DIR, f"{current_event['start_at'].strftime('%Y-%m-%d_%H-%M-%S.%f%z')}.png")
spectrogram_path = os.path.join(DETECTIONS_DIR, f"{filename_prefix}.png")
plt.savefig(spectrogram_path)
plt.close()
# write flac
flac_path = os.path.join(DETECTIONS_DIR, f"{current_event['start_at'].strftime('%Y-%m-%d_%H-%M-%S.%f%z')}.flac")
soundfile.write(flac_path, event_clip, samplerate, format='FLAC')
def main():